Part 4/6:
Interestingly, older sections of the wall, particularly those built with rammed earth, exhibit significant signs of biocrusts. This leads to a pivotal question: do these living organisms aid in the preservation or deterioration of the ancient structure?
While the presence of lichen and moss may alter the expected visual appeal of the Great Wall, researchers are tasked with finding a balance between the benefits provided by protective vegetation and the aesthetic values that many visitors hold dear. The advent of climate change further complicates this scenario, as the environmental shifts demand a reevaluation of preservation strategies.